Question

when current is switched on in a room heater it_________.

Answer 1

start to glow and produsce heat.

Answer 2

Answer:

When “current is switched” on in a “room heater” it produces heat due to “the heating effect” of the electric current.

Explanation:

• The “heating effect of electric current” is its ability to produce heat when passing through a conductor.
• A heating element in a room heater is made up of metal, mostly nichrome, which is a “good conductor of electricity”.
• The electrical energy from the current passing through the filament is converted to heat energy and thus produces heat.
• Other instruments which produce heat through the “heating effect of current” are electric iron and kettle.